https://www.reuters.com/article/us-usa-election-facebook-extremists-excl/exclusive-facebook-tracking-a-rise-in-violent-rhetoric-tied-to-u-s-presidential-inauguration-idUSKBN29I28L >Facebook Inc has seen an increase in signals indicating potential future acts of violence associated with efforts to contest the result of the U.S. presidential election since the Capitol siege last week, a company spokeswoman told Reuters.